Craftsman 143.991200 Specifications download pdf (Page 53)

CHAPTER 7 FLYWHEEL BRAKE SYSTEMS

GENERAL INFORMATION

Tecumseh’s brake systems are required to meet compliance standards which has become a federal law as of

June 30, 1982. Listed below are two methods used by original equipment manufacturers to meet compliance

standards.

1. Use of the blade brake clutch in conjunction with a top mounted recoil starter or 12 volt electric starter.

The blade must stop within three seconds after the operator lets go of the blade control bail at the operator

position and the engine continues to run. Starter rope handle is either on the engine or on the equipment

handle.

2. Use of a recoil starter with the rope handle on the engine as opposed to within 24 inches (61 cm) of the

operator position. This method is acceptable if the mower deck passes the 360 degree foot probe test. A

specified foot probe must not contact the blade when applied completely around the entire blade housing.

This alternative can be used with engine mounted brake systems and typical bail controls. The blade

must stop within three seconds after the operator lets go of the engine/blade control bail at the operator

position and the engine is stopped.

Tecumseh’s flywheel brake system provides consumer safety by killing the engine and stopping the lawnmower

blade within three seconds after the operator releases the engine/blade control bail at the handle of the lawnmower.

This system is available on recoil and electric start models. The engine stopping time is affected by the engine

R.P.M. Consult microfiche card # 30, the Plus 1 or Parts Smart Look-up system, or Service Bulletin # 107 to

determine the correct engine speed or blade tip speed.

OPERATION

In the stop position the brake pad is applied to the inside edge of the flywheel, at the same time the ignition

system is grounded out (diag. 1).

In order to restart the engine, the engine/blade control bail must be applied. This action pulls the brake pad away

from the inside edge of the flywheel and opens the circuit to the ignition ground out terminal. On electric start

systems the starter is energized by an ignition/start switch or a two motion control. On nonelectric start systems,

the recoil starter rope must be pulled to start the engine (diag. 2).

BRAKE "OFF"

BRAKE "ON"

GROUND

CLIP

BRAKE

PAD

IGNITION

GROUND

WIRE

IGNITION

GROUND

WIRE

GROUND

CLIP

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Craftsman 143.991200 Specifications Page 53